Michael T. Owyang, Jeremy Piger, and Daniel Soques, "Contagious 
Switching", Journal of Applied Econometrics, Vol. 37, No. 2, 2022,
pp. 415-432.

All files are zipped in the file ops-files.zip.

OPS_Data.xlsx contains the data. The page "Details" contains variable
  descriptions and sources.

OPS_PCA.m conducts the principal components analysis.

OPS_Main.m estimates each model specification and saves the results as
  mat files.

OPS_Tables_Figures.m generates the exhibits after running OPS_Main.m

The folder "functions" contains all the necessary subroutines.